you don't buy a minign rig for scrypt you buy an asic, but they are not available, check the buy group for the L3, will be shipped later this summer, and before they ship that the diff will be too high for any good profit, better to focus on gpu they have better resale value and better profit
Im not sure Id be buying ASICs right now, but to each their own.
With the release of the A3 and L3 miners the difficulty has gone way up and continues to raise daily. The miners listed here, if they are not scams, will add to that difficulty as well as BW.com releasing a new miner (not for public sale) "soon". I can see us pushing the diff up to half a million by 2018.
what is the A3 for scrypt or something else? the L3 should be the most powerful never heard of the A3